Compilare: user.cpp: In function ‘int main()’: user.cpp:32: warning: array subscript has type ‘char’ user.cpp:47: warning: array subscript has type ‘char’ user.cpp:65: warning: array subscript has type ‘char’ user.cpp:69: warning: array subscript has type ‘char’ user.cpp:74: warning: array subscript has type ‘char’ user.cpp:8: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:9: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:28: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result user.cpp:43: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result user.cpp:56: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:57: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:58: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:62: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:67: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result /tmp/ccK2IRR2.o: In function `main': user.cpp:(.text+0x150): warning: the `gets' function is dangerous and should not be used.